more snow fell, making hunting more difficult in winter...In previous generations, if climate changed, nomadic groups might have migrated to follow familiar resources or adopt techniques from neighbours who had already adapted to forces novel to them.

Not every instance of bad weather is related to global warming...One thing NOAA is clear about, though, is that continued warming will increase the frequency and severity of certain events, which will require humans to adapt. [Would warming *decrease* the frequency and severity of certain other events?]